Landau Analysis in Momentum Space with Massless Particles: an Amuse Bouche
High Energy Physics - Theory
2025-12-16 v1
Abstract
We illustrate how methods from Landau analysis that have been developed for studying the properties of massive Feynman integrals in momentum space can be generalized to massless integrals. We consider integrals with both massive and massless propagators in arbitrary dimensions, paying attention to square root branch points. By focusing on a number of well-chosen examples, we show how resolution of singularities (via blow-ups or complex structure deformation) can be used to predict how the behavior of these integrals is modified as different numbers of propagators are chosen to be massless.
Keywords
Cite
@article{arxiv.2512.12763,
title = {Landau Analysis in Momentum Space with Massless Particles: an Amuse Bouche},
author = {C. Vergu},
journal= {arXiv preprint arXiv:2512.12763},
year = {2025}
}